JPH0126468B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an air conditioning system, and in particular, a heat pump that is designed to effectively utilize exhaust heat during cooling operation, and also to effectively utilize outside air heat and indoor exhaust heat. Related to air conditioning and heating equipment.

(Prior Art) In recent years, air-conditioning and heating devices that can perform cooling and heating with the same device have become popular in general households. This not only has the advantage of freeing you from the hassle of using only the air conditioner in the summer and installing and using various heating devices, especially gas and oil burners, in separate locations in the winter, but also The biggest advantage over other devices is that there is no risk of explosion or fire. However, even with this widespread use, it is still necessary to use gas or petroleum equipment to supply hot water for baths or kitchens in ordinary households, and the risks of explosion, fire, and even gas poisoning are completely eliminated. The current situation is that this cannot be said. In particular, managers of apartments and leased condominiums are burdened with both physical and mental management to prevent the above-mentioned risks.

In contrast, heat pump type air-conditioning and heating devices have recently become popular.

FIG. 1 is a schematic diagram of a conventional heat pump air-conditioning device. A heat exchanger 3 with indoor air, a capillary 4 as a refrigerant throttling resistance part, and a heat exchanger 5 with outdoor air are connected to the refrigerant compressor 1 via a pilot type four-way switching valve 2 that uses differential pressure. are doing. 6 is a gas-liquid separator, 7 is a blower that blows indoor air into the room through the heat exchanger 3, and 8 is a blower that blows outdoor air outside through the heat exchanger 5.

In this device, a four-way switching valve 2 switches between cooling operation and heating operation. That is, as shown by the solid line in the figure, the high-pressure, high-temperature refrigerant from the refrigerant compressor 1 is radiated to the outside through the heat exchanger 5 by the four-way switching valve 2, and then throttled by the capillary 4 and evaporated by the heat exchanger 3. A cooling operation is performed to cool the indoor air. Also, as shown by the broken line,
The high-pressure high-temperature refrigerant from the refrigerant compressor 1 is radiated into the room through the heat exchanger 3 by the four-way switching valve 2, and then throttled by the capillary 4 and exchanged with outdoor air by the heat exchanger 5, thereby absorbing the outside air heat. , a heating operation is performed to warm the indoor air.

(Problems to be Solved by the Invention) As is clear from the above description, thermal energy is discharged outdoors through the heat exchanger 5 during cooling operation.

The technical problem of the present invention is to focus on the economic efficiency and safety of heat pump type air conditioning and heating equipment, and to create a heat pump type air conditioning and heating water heater that uses exhaust heat during cooling operation and outside air heat to heat water for baths with a simple refrigerant circuit configuration. The goal is to provide equipment.

Another object of the present invention is to realize a heat pump type air-conditioning/heating water heating device that can effectively use the remaining hot water in a bath as a heating heat source with a simple circuit configuration.

(Means for Solving the Problems) A heat pump air conditioning/heating water heater according to the present invention includes a refrigerant compressor, two four-way switching valves, a refrigerant throttling resistance section, a first heat exchange means to be installed in a bathtub, and an indoor a second heat exchange means for exchanging heat with air;
including a third heat exchange means for exchanging heat with outdoor air;
By switching the four-way switching valve, the refrigerant compressor →
A first circuit of first heat exchange means → second heat exchange means → throttling resistor → third heat exchange means → refrigerant compressor, and refrigerant compressor → first heat exchange means → third heat exchange means exchange means → throttle resistance section → second heat exchange means → second circuit called refrigerant compressor, and refrigerant compressor → second circuit.
heat exchange means→throttle resistance section→third heat exchange means→
It is characterized in that the first heat exchange means and the third circuit, which is the refrigerant compressor, can be switched and formed.

(Example) Examples of the present invention will be described below.

FIG. 2 shows a schematic configuration diagram of an embodiment of the present invention.
In the figure, the same parts as in FIG. 1 are given the same numbers.

This device consists of a four-way switching valve 2 and an indoor heat exchanger 3.
A bath heat exchanger 9 disposed in the bathtub and a four-way switching valve 10 are inserted and connected between the bathtub and the outdoor heat exchanger 5. 11 is a solenoid valve, and 12 is a check valve.

This device consists of four-way switching valves 2, 10 and a solenoid valve 1.
The opening/closing operation of step 1 allows for cooling mode, cooling and bath water boiling mode, heating mode, heating and bath water boiling mode, bath water boiling mode,
Furthermore, six operating modes can be realized, including a heating mode that uses the remaining bath water.

Each operation mode will be explained below.

Cooling mode Refrigerant compressor 1 → Four-way switching valve 2 (thick solid line in the diagram) → Bath heat exchanger 9 → Four-way switching valve 10 (thick solid line in the diagram) → Outdoor heat exchanger 5 → Capillary 4
A refrigerant circulation circuit is formed: → indoor heat exchanger 3 → four-way switching valve 10 (thin solid line in the figure) → gas-liquid separator 6 → refrigerant compressor 1. In this case, because the solenoid valve 11 is closed, the high-pressure, high-temperature refrigerant from the refrigerant compressor 1 passes through the bath heat exchanger 9 and is cooled by the water in the bathtub. Furthermore, heat is radiated outdoors by operating the outdoor blower 8, and the sufficiently liquefied refrigerant is evaporated in the indoor heat exchanger 3, and cooling is performed by operating the blower 7. Note that the bath heat exchanger 9 may be bypassed by opening the solenoid valve 11.

Cooling and bath water heating mode Refrigerant compressor 1 → Four-way switching valve 2 (thick solid line in the diagram) → Bath heat exchanger 9 → Four-way switching valve 10 (thick solid line in the diagram) → Outdoor heat exchanger 5 → Capillary 4
→ Indoor heat exchanger 3 → Four-way switching valve 10 (thin solid line in the diagram) → Four-way switching valve 2 (thin solid line in the diagram) →
A refrigerant circulation circuit from the gas-liquid separator 6 to the refrigerant compressor 1 is formed. Further, the solenoid valve 11 is closed and the outdoor blower 8 is stopped. As a result, the high-temperature, high-pressure refrigerant from the refrigerant compressor 1 exchanges heat with the water filling the bathtub in the bath heat exchanger 9 to heat water for the bath. Since the bath heat exchanger 9 radiates sufficient heat in this way, the outdoor heat exchanger 5
Therefore, there is no need to operate the outdoor blower 8 to waste heat. In other words, in this mode,
Power consumption can be reduced by effectively utilizing exhaust heat from cooling and by stopping the outdoor blower 8. Of course, the indoor blower 7 is driven in the indoor heat exchanger 3, and the indoor air is cooled by the evaporation of the liquefied cooling refrigerant sent through the capillary 4, thereby performing a cooling operation.

Heating mode Refrigerant compressor 1 → Four-way switching valve 2 (thick broken line in the diagram) → Solenoid valve 11 → Check valve 12 → Four-way switching valve 10 (thick broken line in the diagram) → Indoor heat exchanger 3 → Capillary 4 → Outdoor heat exchange device 5 → four-way switching valve 10
A refrigerant circulation circuit is formed (thin broken line in the figure) → four-way switching valve 2 (thin broken line in the figure) → gas-liquid separator 6 → refrigerant compressor 1. That is, the solenoid valve 11
Because of the opening, the high pressure and high temperature refrigerant from the refrigerant compressor 1 mostly bypasses the bath heat exchanger 9. Therefore, heat is radiated indoors by the indoor heat exchanger 3 by operating the blower 7, and the outdoor blower 8 is also driven, resulting in the same operation mode as the heating operation shown in FIG.

Heating and bath water boiling mode Refrigerant compressor 1 → Four-way switching valve 2 (thick broken line in the figure) → Bath heat exchanger 9 → Four-way switching valve 10 (thick broken line in the figure) → Indoor heat exchanger 3 → Capillary 4
→ Outdoor heat exchanger 5 → Four-way switching valve 10 (thin broken line in the figure) → Four-way switching valve 2 (thin broken line in the figure) →
A refrigerant circulation circuit from the gas-liquid separator 6 to the refrigerant compressor 1 is formed. Of course, the solenoid valve 11 is closed. In this mode, the high-pressure, high-temperature refrigerant from the refrigerant compressor 1 exchanges heat with the water filled in the bathtub in the bath heat exchanger 9 to heat the bath water, and then the indoor heat exchanger 7 is operated by the indoor blower 7. At step 3, heat is radiated into the room and heating operation is performed. The refrigerant leaving the indoor heat exchanger 3 is throttled by the capillary 4, evaporated in the outdoor heat exchanger 5 by the operation of the outdoor blower 8, exchanges heat with outdoor air, and returns to the refrigerant compressor 1.

Bath water boiling mode The refrigerant circulation circuit is the same as in the heating and bath water heating modes described above, but the blower 7 is stopped. That is, the bath heat exchanger 9 exchanges most of the heat of the high-pressure, high-temperature refrigerant from the refrigerant compressor 1, and is operated so as to be used only for heating bath water. Such a mode is most suitable for spring and autumn when air conditioning or heating is not required.

Heating mode using remaining bath water Refrigerant compressor 1 → Four-way switching valve 2 (thick one-dot chain line in the figure) → Four-way switching valve 10 (thick one-dot chain line in the figure) → Indoor heat exchanger 3 → Capillary 4 → Outdoor heat exchanger 5 → Four-way switching valve 10 (thin dot-dash line in the diagram) → Bath heat exchanger 9 → Four-way switching valve 2 (thin dot-dash line in the diagram) → Gas-liquid separator 6 → Refrigerant compressor 1
A refrigerant circulation circuit is formed. Note that the check valve 12 is provided to improve the reliability of preventing backflow by the electromagnetic valve 11.

In this mode, the high-pressure, high-temperature refrigerant from the refrigerant compressor 1 radiates heat into the room by operating the blower 7 to perform heating operation. The cooled liquefied refrigerant is then squeezed by the capillary 4, and the heat exchanger 5 absorbs the outside air heat by operating the blower 8, and further absorbs heat from the hot water remaining in the bathtub after using the bathtub, during normal heating operation. Refrigerant compressor 1 at a temperature higher than
Return to This allows the refrigerant compressor 1 to send even higher temperature refrigerant to the indoor heat exchanger 3, improving heating efficiency. In other words, the heat of the hot water remaining in the bathtub can be used as heating energy.

As explained above, according to this embodiment, by using two four-way switching valves, exhaust heat during cooling operation can be used as a heat source for heating bath water with a simple circuit configuration. You can boil water, and conversely, you can also use the remaining hot water from the bath for heating. Furthermore, in spring and autumn when air conditioning or heating is not required, bath water heating can be operated independently.

Note that if there is no need to consider operation for cooling or heating only, the bypass circuit using the solenoid valve 11 is omitted.

FIG. 3 shows a control circuit for controlling switching between seven operating modes, including the six operating modes described above plus ventilation operation.

Each operating mode is switched and set by a rotary switch, and each switch S ₁ to S ₈ is closed when each operating mode m ₁ to _{m 7} assigned thereto in the figure is set. The operating modes are: _m1 : cooling operation, _m2 : cooling and bath water boiling operation, _m3 : heating operation, _m4 : heating and bath water boiling operation, _m5 : bath water boiling operation,
_m6 : Heating operation using the remaining bath water, _m7 : Ventilation operation. Further, _S0 is a main switch, TM is a timer motor for operation control by a timer, 25 is a bath temperature control thermostat that closes and opens the solenoid valve 11 when the temperature rises to a set temperature, 26 is a room temperature control thermostat, During cooling operation, the terminal is on the L side while the temperature is higher than the cooling set temperature, and when the cooling set temperature is reached, the terminal H is on.
During heating operation, it is on the terminal H side while the temperature is lower than the heating set temperature, and when the heating set temperature is reached, it is switched to the terminal L side to control the on/off of the refrigerant compressor 1. _R1 to _R3 are control relays.

FIGS. 4a and 4b are diagrams showing switching of the flow paths by the four-way switching valve, respectively.

FIG. 5 shows an example of the indoor installation structure of the device of the present invention.

The device 20 of the present invention is assembled into a panel unit structure that can form part of the outer wall 18 of the bathroom 16. That is, a refrigerant compressor 1, an outdoor heat exchanger 5, an outdoor blower 8, etc. are installed inside the panel unit having the window 22, and are fitted into an opening provided in the outer wall 18. And indoor blower 7
is configured to communicate with the room 19 through the duct 21. Further, the bath heat exchanger 9 is arranged inside the bathtub 17.

As is clear from the above description, the air conditioning/heating water heater according to the present invention has the following features.

Unlike conventional heating and cooling equipment, it can be used effectively throughout the year. In other words, it can be used to heat bath water when air conditioning or heating is not required.

By providing the air-conditioning device with the function of a bath water heating device, it is possible to reduce the cost of the device itself and simplify the installation work, compared to the conventional example in which each device is installed separately.

The remaining hot water from the bath can be used for heating. That is, after taking a bath, the bath heat exchanger used to heat the bath water can be operated as an evaporator using a four-way switching valve, thereby absorbing heat from the remaining hot water and using it for room heating. Of course, by simply filling the bathtub with tap water instead of leftover hot water, you can utilize the heat determined by the difference between the evaporation temperature and the tap water temperature.

(Effects of the Invention) As explained above, the heat pump type air conditioning/heating water heating device according to the present invention uses two four-way switching valves to utilize outside air heat as energy for space heating and bath water heating with a simple circuit configuration. , exhaust heat from air conditioning operation can be used as energy for heating bath water. Furthermore, the remaining hot water in the bath can be used for heating, which greatly contributes to energy savings.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a conventional heat pump air-conditioning device, FIG. 2 is a schematic configuration diagram of an embodiment of the present invention, FIG. 3 is an example of its control circuit, and FIGS. 4a and 4b are, respectively, FIG. 5, which is a diagram showing the switching operation of the four-way switching valve, shows an example of the installation structure of the device of the present invention. In the figure, 1 is a refrigerant compressor, 2 is a four-way switching valve, and 3 is a refrigerant compressor.
is an indoor heat exchanger, 4 is a capillary, 5 is an outdoor heat exchanger, 6 is a gas-liquid separator, 7 is an indoor blower, 8 is an outdoor blower, 9 is a bath heat exchanger, 10 is a four-way switching valve, 11 is an electromagnetic 12 is a check valve, 25 is a bath temperature control thermostat, and 26 is a room temperature control thermostat.

Claims (1)

[Claims] 1 Refrigerant compressor, two four-way switching valves, refrigerant throttling resistance unit, first heat exchange means to be installed in the bathtub, second heat exchange means to exchange heat with indoor air, heat exchange with outdoor air A third heat exchange means is included, and by switching the four-way switching valve, the refrigerant compressor → first heat exchange means → second heat exchange means → throttling resistor → third heat exchange means → refrigerant compressor. A second circuit includes a first circuit, a refrigerant compressor → first heat exchange means → third heat exchange means → throttling resistor → second heat exchange means → refrigerant compressor, and a second circuit, refrigerant compressor → first heat exchange means → third heat exchange means → throttling resistor → second heat exchange means → refrigerant compressor. A heat pump type air-conditioning/heating water boiling device characterized in that a third circuit consisting of a second heat exchange means → a throttle resistor → a third heat exchange means → a first heat exchange means → a refrigerant compressor can be formed by switching. .